DTC B1785: Front Occupant Classification Sensor LH Collision Detection [02/2017 - 09/2019]: Description
DTC B1785 is stored when the occupant detection ECU receives a collision detection signal sent by the front in weight detection sensor sub-assembly in the case of an accident.
DTC B1785 is also stored when the front seat assembly RH is subjected to a strong impact, even if an actual accident did not occur.
If the vehicle was not in a collision, but the occupant detection ECU receives a collision detection signal and stores DTC B1785, the DTC can be cleared by performing zero point calibration.
Therefore, if DTC B1785 is output, first perform zero point calibration.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| B1785 | Front Occupant Classification Sensor LH Collision Detection | Any of the following conditions is met:
|
Front in weight detection sensor sub-assembly (Front seat adjuster assembly RH)* |
- *: The front in weight detection sensor sub-assembly is built into the front seat adjuster assembly RH.
DTC DETECTION CONDITIONS
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | Ignition switch ON | ◦ | ◦ |
| Malfunction Status | Front in weight detection sensor sub-assembly sensed large load. | ◦ | - |
| Front seat adjuster assembly RH malfunction | - | ◦ | |
| Detection Time | - | - | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.